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GHSA-CMC8-G72C-8F33

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

erofs: delimit inode_share cache key components

Previously, inode_share keys were encoded as follows:

fingerprint || domain_id

It would be better to have a separator between the fingerprint and domain ID so that the fingerprint won't be parsed as part of a domain ID.

Change the key encoding as follows:

domain_id || '\0' || fingerprint

Since domain_id is a NUL-terminated string, this makes the in-memory key indices unambiguous.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98005"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: delimit inode_share cache key components\n\nPreviously, inode_share keys were encoded as follows:\n\n  fingerprint || domain_id\n\nIt would be better to have a separator between the fingerprint and domain\nID so that the fingerprint won\u0027t be parsed as part of a domain ID.\n\nChange the key encoding as follows:\n\n  domain_id || \u0027\\0\u0027 || fingerprint\n\nSince domain_id is a NUL-terminated string, this makes the in-memory key\nindices unambiguous.",
  "id": "GHSA-cmc8-g72c-8f33",
  "modified": "2026-09-25T12:31:32Z",
  "published": "2026-09-25T12:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98005"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16322a67336cfeea0af4b05206ef8d0e0eda55bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96bf9831fbf423b8104f7948cd8fe7007ecfb46c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98005 (GCVE-0-2026-98005)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23

Title

erofs: delimit inode_share cache key components

Summary

In the Linux kernel, the following vulnerability has been resolved: erofs: delimit inode_share cache key components Previously, inode_share keys were encoded as follows: fingerprint || domain_id It would be better to have a separator between the fingerprint and domain ID so that the fingerprint won't be parsed as part of a domain ID. Change the key encoding as follows: domain_id || '\0' || fingerprint Since domain_id is a NUL-terminated string, this makes the in-memory key indices unambiguous.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/16322a67336cfeea0…
https://git.kernel.org/stable/c/96bf9831fbf423b81…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e0bf7d1c074dc4252223ae897560345ccc24100d , < 16322a67336cfeea0af4b05206ef8d0e0eda55bb (git) Affected: e0bf7d1c074dc4252223ae897560345ccc24100d , < 96bf9831fbf423b8104f7948cd8fe7007ecfb46c (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "16322a67336cfeea0af4b05206ef8d0e0eda55bb",
              "status": "affected",
              "version": "e0bf7d1c074dc4252223ae897560345ccc24100d",
              "versionType": "git"
            },
            {
              "lessThan": "96bf9831fbf423b8104f7948cd8fe7007ecfb46c",
              "status": "affected",
              "version": "e0bf7d1c074dc4252223ae897560345ccc24100d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc3",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: delimit inode_share cache key components\n\nPreviously, inode_share keys were encoded as follows:\n\n  fingerprint || domain_id\n\nIt would be better to have a separator between the fingerprint and domain\nID so that the fingerprint won\u0027t be parsed as part of a domain ID.\n\nChange the key encoding as follows:\n\n  domain_id || \u0027\\0\u0027 || fingerprint\n\nSince domain_id is a NUL-terminated string, this makes the in-memory key\nindices unambiguous."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:23:31.722Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/16322a67336cfeea0af4b05206ef8d0e0eda55bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/96bf9831fbf423b8104f7948cd8fe7007ecfb46c"
        }
      ],
      "title": "erofs: delimit inode_share cache key components",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98005",
    "datePublished": "2026-09-25T10:23:31.722Z",
    "dateReserved": "2026-09-25T10:19:56.068Z",
    "dateUpdated": "2026-09-25T10:23:31.722Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-CMC8-G72C-8F33

CVE-2026-98005 (GCVE-0-2026-98005)

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